Automatic slack adjuster assembly for vehicle braking system

Details Automatic slack adjuster assembly for vehicle braking system Automatic slack adjuster assembly for vehicle braking system

2007-04-03

2007-04-03

Schwartz, Chris (Department: 3683)

Brakes

Wheel

Transversely movable

Reexamination Certificate

active

10867847

ABSTRACT:
The invention pertains to the fluid powered brake systems of vehicles using brake drum and lined brake shoes internally expanded by cam. The invented device automatically adjusts the slack, which develops due to the wearing of brake liners and the drum. When the angular movement of the Lever Housing (1) exceeds the desired limit due to the wear, the internal device adjusts the excess clearance of slack automatically. The parts consist of a Worm Wheel (3); an enmeshing Worm Shaft (4); a Paul (6); a Leaf Spring (1); a Ratchet cylinder (5); an Acuator Rod (7); a Guide (9); an End Connector (8); a Clevis (2); and Clevis Pins (2A) and2(B). When brakes are applied, the Actuator Rod (7) gets pulled out and engages the Paul (6) with the Ratchet cylinder (5). On the return stroke the Paul (6) rotates the worm shaft (4) which in turn rotates the worm wheel (3) and the attached cam thereby removing the slack.

REFERENCES:
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patent: 3618715 (1971-11-01), Bostwick
patent: 3727728 (1973-04-01), Bostwick
patent: 3949840 (1976-04-01), Cumming et al.
patent: 4380276 (1983-04-01), Sweet et al.
patent: 4484665 (1984-11-01), Svensson
patent: 4544046 (1985-10-01), Lissau
patent: 4621714 (1986-11-01), Skurka
patent: 4895226 (1990-01-01), Berg et al.
patent: 5036958 (1991-08-01), Yamamoto
patent: 5350043 (1994-09-01), Crewson et al.
patent: 1 146 965 (1969-03-01), None
patent: WO 03/083322 (2003-10-01), None

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